Valve-seat-dressing tool



l. J. BLAIR VALVE SEAT DRESSING TOOL.

APPLICATION FILED SEPT. 19. 1919.

1,365,449. Patented Jan. 11,1921.

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1,365,449. I p fi t q f t e s t e Patented Jan.11, 1921, Appli c'ation fil'ed September 19, 411919 Serial No.r325,012. i

To all whomit may concern: e i ,for not'onlydressing and tormingor renew-; Be it known that LlsAAo J L BLAIR; a citiingthebead' ofthe .valve seat but also dresszen of the/United-States, residingfatSpoling down or cutting awaythe'depressed face kane, in the county of S pokanefand State of sumundin uie bead sothatevery timethe 6O Washington, have invented new andusevalve is r'eseated it will have 'an touter defullinprovements in Valve -1Seat *Dressing pressed "face" in just the clearance 'relation Tools, of which the following is a specifibelow the crown ofthe head Jthat it had cation. I l when it was firstinade. i

This invention relates to improvements in MrI t is afurther object and featureof my 5 19' valve seat dressing tools and is limited for l inventionto provide this devicefor dressing use solely in connection with 'valvel seats away that vertical stock ofthe diaphragm having a raised'or elevated closure engaging which merges into :the valve seat so as to headsurrounding,thebore'of theseat; fiprovide I and keep forming an 'arcuate dia- Valves provided with these beads insure 5 phragmflclearance for'the closure at least 7 a water-tight connection with the resilient equal 1'ra'dially from the bore of the valve or packing portion of the' valve cclosure qls eatthe outer radius ol' the depressed face.- when the latter is fir nl'yseated'on the head, .{This feature is of the utmost importance contact being localized on" the crown of the wh'en a valve seatissto be enlarged for an inbeadthereby facilitating a water tightffit. creased sized closure". The presence of thisbead maintains the My invention also includes the feature of closure when seated, in spaced relatien with havinga portion of. the dressing tool shaped the remaining area of the-valve{ seat;'- NoW foiv'ceiitering engagementwith the boreof asthe faucet or othcr valve isc'ontinue'din the valve seat soas to. centerfthe tool in the service, this head wears downand therefore operation of dressing the seat, and in this 80 its height withrespect to that area ofthe connection, the tool is provided witha taper valve seatsurroundingthe' bead; is greatly tov facilitate entrance into the bore in'the reduced. It will "be understoodthat these valve seatiwhen'the same is tobeenlarged. closures slightly overhang the bead,ra dially Another featurei'ofi my invention consists outwardlythereof, and jw'hen the packing in providing means forvavoidingthreaded 5 3 is of a soft nature;the beadiwill form a "engagement with the threaded gland boreof groove in the packing and the*latter will thevalvefthisfeature of my invention being extend downwardly somewhat about the embodied in a centering cone which is slidcrown of the bead. After the bead wears able and rotatable on the spindle of "the downso that the closure is no longer in dressing tool to facilitate quick and accu- 90 5 spaced relation withthe outer clearanceoorrate positioning of the tool in the valve to tion of the valve seat, when the 'closur'e is be dressed. a seated, then leakage; will occur because 'of Myinvention has many other objects and the impossibility of getting a water-'tight en- 'i features which will bemore' fully described gagernent ofthe'closure-againstits seat. In finconnection withthe accoinpan ingi draw 5 40 all valves of thisftype knownto ine, the ing ancl whic'hawilhbe niore'fu 1y pointed valve seat has, an outward annular depressed out in and by the append'edclaims;

face at'an elevation slightly lower thanthe T311 Ii -the drawing e ,.:'bead, and this clearance; area, when the v 'F1gu1'e l",jisavertical sectiona'l'view of a "valve is new, isjsufiicient to l prev entfthe w new -valve p'rovided with a headed valve 100 lower peripheral portion of; the valve {closeat and showing the: closure in engagement 7 the elite: portion of. the" closure engagesl'the V I:

q p 1 HoWeverQ "the primary object of: my insure--from engagil gfiSeidkdepressedf face fthei'ewith;

when' the' closureisse'ated. Howeven asthe i? Fig. 2, isairagmentarjr view of ia valve beam-wears- "dif and: flattens flthis felearance dseat anditthe; closure :after thebeadisewo'rn -distanceis gradually duce-duntil finally downflandhefore it-has been dressedx a v p is'a'silnilarview showingthe valve aid'depressed face' theifehy preventifig en seat fterit has been' dressedbr A "-r agenient' of' the"'closuiewith' the' bea d. .1 "It"'f iF1g.g 4;! isa view ofr;the valve seat-with "off a my improvedtdol it rjposition to=redress the n U.

ig 5, ,is aview iof thezcomplete'tooliilluswe'nuen is" to'provide'mrr' improved3 device hating-ache center'ing -cone' ingtsection'. r

Fig. 6, is a sectional view on line 66 of Fig. 4:.

Like characters of reference designate similar parts throughout the different figures of the drawing.

Inasmuch as my invention, and in ,fact the whole inventive problem to which this invention is addressed, is the formation of a tool for a special use on a special stock article, I will first describe such article by reference to Fig. 1; As illustrated, l designates an ordinary faucet form of valve, the

chamber of which is partitioned off'by the usual diaphragm 2. in a part of which the valve seat is formed. The bore of the valve seat is indicated at 3. Coaxiallydisposed above and with respect to the axis of the bore 3' is the gland extension l which is, shown provided with internal threads 5. .Aclosure is generally indicated at 6 and the samewill have a threaded stem of the usual form, not

shown, for engagement with the threads 5.

The lower end of the closure 6 is cupped and i the flange 7 thereof surrounds the packing 8, of the closure. This packing is usually of relatively soft material and is. removably secured, as shown, by a headed screw9. It will be seen that the flange 7 extends downwardly to within a very short distance of the bottom face 10 of the packing 8. This figure is drawn to show a brand new faucet in which a portion of the seat is formedby an elevated bead 11 which merges into the wall 12 of the bore 3, on the interior of said bead. The exterior of said bead terminates at a,

depressed face 13 and the diaphragm por tion 14 constituting a clearance area with which the closure is in ample spaced relation. However, as the bead wears down, as shown in Fig. 2, the closure will be brought into engagement with the depressed face 18 and a firm engagement with the bead will be impossible. In fact, the lower edge of the flange 7 will prevent a water-tight engage merit of the closure withits seat and the faucet will leak. It is now customary to discard such faucets which are otherwise capable of prolonged service, merely because the bead has been worn off.

In Fig. 3 I have shown the valve seat of Fig. 2 as it would appear after being reseated bymy improved tool in which it will be seen that the outer annular clearance 's the same as in Fig. 1. In Fig. 4, the tool itself is "shown in the position in which it would assume as the reseating operation is just completed, and I will next refer specifically to this device, reference also being had to Figs. 5 and 6.

My improved device includes a spindle having a. cylindrical portion 15 provided with a slight taper16. Onits. upper end,

- thespindle is of polygonal cross-section to he slipped off from or onto the spindle over the polygonal end. This centering cone is designed to fit any diameter of gland bore witha view of centering the upper portion of thefspindle in the valve.

My improved dressing tool body has a. threaded shank 20 adapted to be turned into the threaded socket 18 of the spindle. This tool body has what I will term a head portion 21 and a bore centering portion 22. Projecting radiallyfrom said body is one, or a plurality of wings 23 all of which are identical in form and operation and only one of which need be described in detail. The lowerportions 24 of said wings have their edgestapered off, asindicated at 25, and these'edges are also chamfered so that each wing willhave a cutting edge 26. These cutting edges 26 are of great service when the bore of a valveseat is to be enlarged as they greatly facilitate a centering entrance of the tool. The bore-engaging portions 27, of the wings, have their edges 28 chainfercd to provide cutting edges 29, for engagement with the bore. It will be understood that V the bore of a valve collects foreign matter and in dressing a seat it is sometimes desirable to not only cut away this foreign matter but also to slightly dress off the surface of the bore. (This insures effective centering of the tool in the bore.

The head portions2l of said wings have bead-forming notches 30 which are suitably chamfered as indicated at 31, the cutting edges merging into the cutting edges 29 and .the chamfered edges 31 merging into the chamfered edges 32 of the centering portions of the wings. These notches 30 are of a size and diameter to form the desired shape of bead. Outwardly of the notches, the wings have depending straight cutting edges 33'which are chamfered ofi at 34 and serve to cut away the depressed face 13 at a prescribedflevel below the crown of the head as the latter is dressed down. Thus in each dressing operation, the finished valve seat,

or the redressed valve seat, will have. the

same clearance area as the valve seat shown in Fig. 1.

In reseating and also in enlarging reseating operations, it will also be necessary to cut away the diaphragm portion 14. Thus the head portions of the wings are provided with cutting edges 35 which are suitably chamfered or rounded off at 36 for dressing down the arcuate diaphragm portion 14.

I have very successfully personally used and sold tools in accordance with this invention and they are now in extensive use and have resulted in a great saving in the reclaiming in what would otherwise have been discarded faucets and valves.

It is believed that my invention will be fully understood from the foregoing description and while I have herein shown and described one specific form of my invention, I do not wish to be limited thereto except for such limitations as the claims may import.

I claim 1. A re-seating tool for valve seats having a bead and an annular depressed face and diaphragm wall clearance area about the bead, as described, comprising a tool body having a portion adapted to be centered by engagement with the bore of the valve seat and provided with a winged cutting or dressing portion having a bead forming notch to shape the bead when the seat is dressed, and a lower linear cutting edge outwardly of said notch depending below said notch and having cutting engagement with said depressed face of said seat to dress down said face to a prescribed level below the crown of the bead as the latter is dressed down, the winged portion having an outer phragm wall clearance area about the bead,

as described, comprising the tool body having a plurality of cutting or dressing wings extending radially and said wings having bore portions with cutting edges on the outer margins of the wings for dressing the bore of the valve and centering the tool, the lower ends of said wings having tapered cutting edges for entrance of the tool body into a bore to be enlarged, the upper or head portion of the wings being provided with bead forming notches to shape the bead when the a bead and an annular depressed face and,

diaphragm wall clearance area about the bead, as described, comprising a tool body having a plurality of cutting or dressing wings extending radially and said wings having bore portions with cutting edges on the outer margins of the wings for dressing the bore of the valve and centering the tool, the upper or head portion of the wings being provided with head forming notches to shape the bead when the seat is dressed, said wings having depending linear cutting edges disposed radially outwardly with respect to said notches for cutting engagement with said depressed face of said seat to dress down said face to a prescribed level below the crown of the bead as the latter is dressed down, the winged portions having outwardly disposed cutting edges for dressing away the vertical stock of that portion 2f the diaphragm adjoining said depressed ace.

In testimony that I claim the foregoing as my own, I hereby afiix my signature.

ISAAC J. BLAIR.

Maw; 

